Precision Triple Supervisor Monitors Positive or Negative Supplies for Overvoltage & Undervoltage Conditions
The LTC2919 includes a common open-drain reset output and two open-drain comparator outputs that indicate the status of the adjustable inputs. The individual comparator outputs simplify sequencing positive and negative supplies. The reset timeout period can be set to a fixed 400us, fixed 200ms, an adjustable period, or disabled for fast response. Glitch filtering ensures reliable reset operation without false triggering and the LTC2919 guarantees the reset output once VCC rises above 0.5V. In addition to monitoring low voltages, the LTC2919 s VCC supply includes a 6.5V shunt regulator, which when connected to an external current limiting resistor, allows a high voltage supply to power the device. This makes the LTC2919 a good fit for multichannel low voltage designs and high voltage positive or negative monitoring.
The LTC2919 is available today in commercial, industrial, and automotive temperature grades.
Summary of Features: LTC2919
- Two Low Voltage Adjustable Inputs Monitor Overvoltage or Undervoltage Conditions
- Accurate VCC UVLO for 2.5V, 3.3V and 5V Systems
- Open-Drain RST, OUT1, OUT2 Comparator Outputs
- Pin-Selectable Input Polarity Allows Negative, UV or OV Monitoring
- Guaranteed Operation to 125 C
- Guaranteed Threshold Accuracy: ±1.5%
- 6.5V Shunt Regulator for High Voltage Operation
- Buffered 1V Reference Output for Negative Monitoring
- Low Quiescent Current: 50uA
- Adjustable Reset Timeout Period
- Tiny MSOP-10 and (3mm × 2mm) DFN-10 Packages
LINEAR TECHNOLOGY GmbH
Linear Technology Corporation, a manufacturer of high performance linear integrated circuits, was founded in 1981, became a public company in 1986 and joined the S&P 500 index of major public companies in 2000. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, uModule(TM) products, and many other analog functions. Applications for Linear Technology's high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems. For more information, visit www.linear.com.
LT, LTC, LTM, Burst Mode and are registered trademarks and uModule is a trademark of Linear Technology Corp. All other trademarks are the property of their respective owners.
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